simpson



Jan. 31, 1956 w. o. SIMPSON 2,732,810

DISPENSERS Filed May 28, 1954 W. O. SIMPSON ATTORNEY United States Patent 2,732,810 DISPENSERS,

- Application May 28, 1954, Serial No. 433,209

2 Claims. (Cl. 103-230) This invention relates to dispensers, and more particularly to dispensers of liquids.

An object of the invention is to provide new and improved apparatus for dispensing liquids in predetermined quantities.

A further object of the invention is to provide apparatus for dispensing predetermined quantities of sticky, viscous liquid.

A dispenser illustrating certain features of the invention may include a valve body having a straight passage therethrough with a pair of spaced valve seats facing in the same direction positioned between the ends of the passage. Means are provided for supplying liquid under pressure to an inlet end of the passage, and reversible pump means communicate with the portion of the passage between the valve seats. A removable valve closure assembly insertable into the passage from the end opposite to the inlet end includes a valve closure member carried on a rod urged toward the seat nearer the inlet end, and a second closure member slidable on the rod is urged toward the other seat.

A complete understanding of the invention may be obtained from the following detailed description of a dispenser forming a specific embodiment thereof, when read in conjunction with the appended drawings, in which Fig. 1 is a fragmentary, vertical section of a dispenser forming one embodiment of the invention, and

Fig. 2 is a fragmentary, vertical section of the dispenser shown in Fig. 1 with parts thereof shown in different positions from those shown in Fig. I.

Fig. 3 is an assembly of the dispenser with parts broken away.

Referring now in detail to the drawings, there is shown therein a dispenser 13 for dispensing a predetermined quantity of a sticky, adhesive liquid on each actuation thereof. The dispenser includes a support for supporting a container 11 for receiving the liquid from a spout 12 of the dispenser 13 which is heated. The dispenser 13 includes a valve body 14 having an inlet passage 15 through which the liquid is supplied under a low pressure, for example, a pressure of about seven pounds per square inch. On the up stroke of a doubly sealed piston 16 pulled by a well known reciprocating device (not shown) such as, for example, a pneumatic cylinder, the piston pulls a valve closure member 17 tightly against a tapered exit orifice 18 aided by the action of a spring 19 seated in a cup 31 sealed against a tapered seat 33 in a bore 32, and also pulls a valve closure member 20 away from a tapered entrance orifice 21 against the action of a spring 22 so that the portion of a chamber 23 between the orifices 21 and 18 and the piston 16 is filled with the liquid. The valve member 17 is slidable on a valve rod 35 mounted slidably in bores 36, 37 and 38 in the cup 31 and washers 39 and 40, respectively. A retaining cup is threaded into the righthand end of the passage and acts to retain the 2,732,810 Patented Jan. 31, 1956 spring 22 and the valve members in the passage. On the feed stroke of the piston 16, the pressure of the liquid in the chamber 23 forces the valve body 20 against the orifice 21 to close it and forces the valve body 17 to the right, away from the exit orifice 18 to discharge a measured quantity of the compound through the spout 12. The stroke of an arm 27 secured to the piston 16 is limited by an adjustment screw 28 secured adjustably to the valve body 14 to control the stroke of the piston with a fixed stop 45 limiting upward travel of the piston. The strength of the spring 22 is just sufficient to keep the valve member 20 closed when working only against the pressure of the liquid.

The valve seat 33 is large enough to permit the valve closure member 20 to be moved therethrough when the retaining cup 25 is removed from the valve body 14, and the valve closure member 17, the cup 31, the springs 19 and 22 and the washers 39 and 40 all may be withdrawn with the closure member 20 for replacement or repair.

The above-described dispenser is simple and positive in operation, and is inexpensive to construct and operate.

It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.

What is claimed is:

l. A dispenser, which comprises a valve body having therein a passage provided with an inlet end and a second end, said body also being provided with an inlet valve seat concentric with the passage facing said second end and an exit valve seat concentric with the passage facing said second end and positioned between the inlet valve seat and said second end of the passage, said body also having a pumping opening connected to the portion of the passage between the valve seats and an exit opening connected to the portion of the passage between the exit valve seat and the second end of the passage, a valve head, a valve rod fixed to the valve head, a spring seat mounted on the rod, a hollow plug mounted in the portion of the passage near the second end thereof, a spring mounted between the plug and the spring seat for urging the valve head toward the inlet valve seat, a second valve head mounted slidably on the rod, a bushing positioned in the passage for closing the passage and guiding the rod, a spring mounted between the bushing and the second valve head for urging the second valve head against the exit valve seat, and reciprocating pump means connected to the pumping opening.

2. A dispenser, which comprises a valve body having a bore therethrough and having a first valve seat and a first counterbore extending from one end of the bore toward a second end of the bore and terminating in the valve seat, said body also being provided with a second valve seat and a second counterbore extending from the first-mentioned end of the bore to a position between the first-mentioned valve seat and that end of the bore and terminating in the second valve seat and having a third valve seat, a third counterbore extending from the first-mentioned end of the bore to a position between the second valve seat and that. end of the bore and terminating in the third valve seat, said body also having a transverse bore communicating with the portion of the first bore between the first valve seat and the second valve seat and an outlet passage communieating with the first bore between the second valve seat and the third valve seat, a reciprocable pumping piston mounted in the second bore, a valve member including a valve head designed to seat in the first valve seat, a

rod secured rigidly to the head at one end and a spring seat secured rigidly to the rod at the other end thereof in the third counterbore, a second valve head mounted slidably on the rod for seating in the second valve seat, a guide bushing designed to seat in the third valve seat for guiding the rod, a cup-shaped retainer designed to be locked in the third counterbore in a position locking the bushing against the third valve seat, a compression spring seated on the spring seat and the retainer, and

a second compression spring seated on the bushing and the second valve head.

References Cited in the file of this patent UNITED STATES PATENTS 

